The Only Drywall Replacement System for Flood-Prone Buildings designed for FEMA Compliance
Built for Below the Base Flood Elevation
If your building is located in a flood zone, the rules change.
Materials used below the Base Flood Elevation (BFE) are not judged by convenience or cost. They are judged by whether they can survive flood conditions without permanent damage.
FEMA’s National Flood Insurance Program (NFIP) and FEMA Technical Bulletin 2 establish clear requirements for flood-damage-resistant materials below the Base Flood Elevation.
Standard gypsum drywall does not meet that standard.
EnduraFlood was created to replace it.
Above BFE
Standard materials permitted.
Below BFE:
Flood-Damage-Resistant
Materials Required
Base Flood
Elevation (BFE)
Lowest Floor
Elevation
What FEMA Actually Requires
Under FEMA NFIP regulations and FEMA Technical Bulletin 2 (Flood Damage-Resistant Materials Requirements), materials used below the BFE must:
Resist flood damage
Withstand direct contact with floodwater
Be capable of cleaning and returning to service
Avoid permanent deterioration after inundation
The intent is clear:
Materials that degrade, swell, disintegrate, or require removal after flooding are not appropriate below the BFE. By "removal" FEMA’s intent is to eliminate porous materials like drywall that must be torn out and discarded after flooding, whereas EnduraFlood’s waterproof panels are designed to be temporarily removed for cleaning and drying, then safely reinstalled without permanent damage.
Removable vs Disposable
When FEMA states that flood-damaged materials below the BFE should not “require removal,” they are referring to traditional porous assemblies like gypsum drywall, insulation, and finishes that swell, degrade, and must be torn out and disposed of after inundation. In other words, FEMA is warning against materials that cannot return to service once wet.
The EnduraFlood waterproof, removable drywall system meets and exceeds this FEMA requirement: While the panels don't have to be removed, they can be temporarily taken out for drying or cleaning and then safely reinstalled because they do not permanently deteriorate or require disposal. The key distinction is that FEMA discourages throwaway construction, not durable, reusable components designed for flood recovery.
The Risk of Using
"Moisture-Resistant" Drywall
Many products are marketed as:
Moisture-resistant drywall
Mold-resistant drywall
Water-tolerant wallboard
But these products are made for exposure to moisture such as water vapor in a bathroom, not to resist a flood event. They still rely on gypsum cores and paper facings.
Floodwater exposure is not the same as humidity resistance.
Submersion is not the same as splash exposure.
When floodwater recedes, these gypsum-based drywall assemblies typically require:
Demolition
Dry-out procedures
Mold remediation
Reconstruction
That cycle directly conflicts with FEMA’s performance-based intent for materials below the BFE.
The Risk of Using Generic Waterproof Panels Screwed Onto Studs
Many panels are marketed as:
Cement board
Glass-mat gypsum board
Tile backer board
These materials are often described as moisture-resistant or mold-resistant.
Some may be considered theoretically FEMA compliant under specific performance criteria.
But compliance language does not eliminate risk inside a wall cavity.
When floodwater enters an assembly, moisture migrates beyond the face of the panel.
Stud bays, insulation, and fastener penetrations retain moisture long after surface drying appears complete. This creates the perfect conditions for undetected and dangerous mold growth inside the wall cavity.
A damp or wet cavity creates conditions for microbial growth.
Even if the panel itself resists deterioration, mold can still develop on framing, dust, or organic debris within the cavity.
Unlike removable panel systems, cement and glass-mat boards are mechanically fastened and sealed.
They are not designed to be opened for inspection, flushed, or dried in place.
Once water has entered the building, it has also entered the wall structure. Wall cavity access typically requires:
Cutting and demolition
Cavity drying procedures
Selective replacement of affected materials
Repeated closing of joints and screw holes with joint compound, sanding, and painting of the entire wall.
Moisture resistance at the surface does not equate to an open, serviceable, flood-resilient wall system.
Some generic waterproof panels may pose unknown fire risks due to lack of relevant testing, documentation or non-compliance with fire safety standards.
A Better Category: Waterproof, Removable Panel Systems
EnduraFlood is not traditional drywall.
EnduraFlood is a waterproof, removable wall system designed specifically for use in flood-prone buildings and below the Base Flood Elevation.
Instead of attempting to improve gypsum drywall, this system eliminates gypsum and other moisture-sensitive components entirely.
It is engineered around one principle:
If floodwater touches it, it should not require tear-out.
Designed to Align with FEMA Flood-Damage-Resistant Requirements
The EnduraFlood waterproof drywall system is designed to meet the performance intent outlined in FEMA NFIP regulations and FEMA Technical Bulletin 2.
It is:
Non-gypsum
Non-cellulosic
Free of paper-faced materials
Resistant to water saturation and deterioration
Capable of cleaning and returning to service after flooding
It is evaluated as a complete wall system, not just a panel or finish layer.
That system-level approach is what makes it suitable for use below the BFE.
Flood Compliance is About the Entire Wall Structure
Many so-called flood solutions fail because they address only the visible surface.
Common issues in flood-prone interiors include:
Decorative panels installed over gypsum drywall
Moisture-resistant board paired with absorbent substrates
Assemblies that trap water behind finished surfaces
FEMA’s requirements apply to materials below the BFE, not just what you see from the room.
EnduraFlood is engineered as a full interior wall assembly to avoid hidden failure points.
Who EnduraFlood Is For
EnduraFlood is designed for buildings located in water-prone or flood-prone areas where durability and resilience are critical:
Coastal area and riverine properties
Residential structures in Special Flood Hazard Areas
Residential and commercial buildings with basements
Homes with driveways sloped downwards from the street to the houseMultifamily developments
Commercial buildings subject to floodplain permitting
Substantial improvements and post-flood rebuilds
If your project involves materials installed below the Base Flood Elevation, or in any area at risk of water intrusion, gypsum drywall is no longer the default choice.
What This System Is Not
To be clear:
EnduraFlood is not gypsum drywall
EnduraFlood is not moisture-resistant drywall
EnduraFlood is not a treated version of drywall
EnduraFlood is not represented as FEMA-approved or FEMA-certified
EnduraFlood is a waterproof drywall replacement system designed to meet FEMA flood-damage-resistant material requirements.
FAQs
1. What does FEMA require for materials below the Base Flood Elevation (BFE)?
FEMA’s National Flood Insurance Program (NFIP) requires that materials installed below the Base Flood Elevation be flood-damage resistant. FEMA Technical Bulletin 2 outlines performance expectations for materials exposed to floodwater, including durability, cleanability, and resistance to deterioration.
2. Is gypsum drywall allowed below the Base Flood Elevation?
Traditional gypsum drywall is generally not considered flood-damage resistant when exposed to floodwater. In flood-prone areas, alternative materials are often required to meet FEMA performance expectations for use below the BFE.
3. Is EnduraFlood FEMA approved?
FEMA does not approve individual products. FEMA establishes performance requirements for materials used below the Base Flood Elevation. EnduraFlood is designed to align with FEMA flood-damage-resistant material expectations for flood-prone buildings.
4. What makes a material flood-damage resistant?
Flood-damage-resistant materials are designed to withstand direct contact with floodwater and return to service without permanent damage. They must resist deterioration, swelling, and structural failure after inundation. EnduraFlood is engineered around these performance principles.
7. How is EnduraFlood different from moisture-resistant drywall?
Moisture-resistant drywall is designed for humidity and splash exposure. Flood-damage-resistant materials must withstand full water immersion and subsequent cleaning without permanent deterioration. EnduraFlood eliminates gypsum and moisture-sensitive components entirely.
The Bottom Line
FEMA’s framework is performance-based.
Materials installed below the Base Flood Elevation must be able to withstand flood conditions without permanent damage.
Traditional gypsum drywall does not meet that expectation below the BFE.
EnduraFlood was designed to.
EnduraFlood is a drywall replacement wall system engineered specifically for flood-prone buildings and for installation below the Base Flood Elevation.